Tire.



D. G. THOMAS TIRE. APPLIOATION 311.111) no. a, 1910.

991,563,. Patented May 9, 1911.

DAVID CYNRIG THOMAS, OF BRONWYDD, LLANISHEN, ENGLAND.

TIRE.

Specification of Letters Patent.

Patented May 9, 1911.

Application filed December 5, 1910. Serial No. 595,682.

T 0 all whom it may concern:

Be it known that I, Davin CYNRIG Trroarns, a subject of the King ofGreat Britain, residing at Bronwydd, Llanishen, in the county ofGlamorgan, lVales, England, have invented a new and useful Tire, ofwhich the following is a specification.

This invention relates to that class of solid elastic tires in which thewhole tire has a certain freedom of movement within its rim, that is tosay, movement is not restrained by screws or the like engaging with therubber or by the use of cement. It has been found that when tires ofthis type are made sufliciently resilient their edges become heated byfriction against the rim when moving radially which causes the rubber todeteriorate.

According to this invention I attach to the inclined sides of a tire ofdovetail crosssection and which abuts against the flanges of a wheelstrips or washers of leather or other suitable hard substance. Thesestrips or washers are of relatively small size so as not to impair theresiliency of the tire, and when a tire provided with longitudinal andtransverse grooves of the kind shown in my Patent No. 836,286 ofNovember 20, 1906 is used, each strip or washer is preferably made notlarger than the space between two transverse grooves.

In the accompanying drawings, Figure 1 shows a side elevation of aportion of a tire with my improvements applied. Fig. 2 is a similar viewshowing a modified construction. Fig. 3 shows a transverse section ofthe tire on the line 33 of Fig. 1, and Fig. 3 also shows such a tiremounted in a wheel mm.

In Figs. 1 and 2 a indicates the tire pro vided with longitudinalgrooves a and transverse grooves a similar to those shown in my U. S.Patent above mentioned. The inclined edges of the tire next the rim, asshown in Fig. 1, are provided with strips 0 of leather or other suitablerelatively hard material which are fixed to the rubber by means ofscrews, as indicated, or other fastening devices may be employed. Thesestrips 0 stand out from the surface of the rubber and they are separatedfrom each other a considerable distance. They are of small size so asnot to impair the resiliency of the tire and each one is shorter thanthe space between two adjacent transverse grooves a so that air maycirculate around the sides of the tire within the rim. Instead ofemploying rectangular strips 0, as shown in Fig. 1, washers I), likethose shown in Fig. 2, may be used.

By the construction shown the tire is prevented from moving radiallyaway from the rim and by means of the grooves 41;, a it is given moreelasticity at its inner portion than at its outer portion. Therefore theinner portion as it is compressed and expanded will move radially in therim but the strips or washers which also move with the inner portion ofthe rim alone move in contact with the sides of the rim, thus avoidingfrictional contact between the sides of the rim and the sides of theinner portion of the tire and hence prevent the heating of the rubber.

I am aware that strips of metal have been applied to the radial sides ofthe base of a tire of dovetail section and that strips of canvas havebeen applied to the inclined side of a tire of dovetail section. I donot claim this construction.

I claim as my invention: 1

The combination with the rim of a wheel of a solid elastic tire ofdove-tail section, whose inner circumference is provided withlongitudinal and transverse grooves to render it more elastic andradially movable and permit the circulation of air, and a series ofseparated relatively short pieces of hard material attached to the sidesof the tire between the transverse grooves which extend out from thesides of the tire, bear against the sides of the rim, hold the tire outof contact therewith and move radially with the tire.

DAVID GYNRIG THOMAS.

WVitnesses:

JOHN HENDERSON WHITEHEAD, WALTER J. SKERTEN.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

